[Lustre-discuss] ost_write operation failed with -28 in 1.8.5 lustre client
Andreas Dilger
adilger at whamcloud.com
Mon May 2 12:58:03 PDT 2011
On Apr 29, 2011, at 09:04, Rajendra prasad wrote:
> I am running lustre servers on 1.8.5 (recently upgraded from 1.8.2). Clients are still on 1.8.2 .
>
> I am getting the error "ost_write operation failed with -28" in the clients. Due to this i am getting error message as "No space left on the device" oftenly. As per lfs df -h output all the OSTs are occupied around 55% only.
>
> lfs df -h
> UUID bytes Used Available Use% Mounted on
> lustre-MDT0000_UUID 52.3G 4.2G 48.1G 8% /opt/lustre[MDT:0]
> lustre-OST0000_UUID 442.9G 245.6G 197.3G 55% /opt/lustre[OST:0]
> lustre-OST0001_UUID 442.9G 238.7G 204.3G 53% /opt/lustre[OST:1]
> lustre-OST0002_UUID 442.9G 243.2G 199.7G 54% /opt/lustre[OST:2]
> lustre-OST0003_UUID 442.9G 236.5G 206.5G 53% /opt/lustre[OST:3]
> lustre-OST0004_UUID 442.9G 234.8G 208.1G 53% /opt/lustre[OST:4]
> lustre-OST0005_UUID 442.9G 239.7G 203.3G 54% /opt/lustre[OST:5]
> lustre-OST0006_UUID 442.9G 237.2G 205.7G 53% /opt/lustre[OST:6]
> lustre-OST0007_UUID 442.9G 227.9G 215.0G 51% /opt/lustre[OST:7]
> filesystem summary: 3.5T 1.9T 1.6T 53% /opt/lustre
> As per the below bugzilla, i have upgraded one of the lustre client verstion to 1.8.5 but still the issue persist in that client.
>
> https://bugzilla.lustre.org/show_bug.cgi?id=22755
>
> Lustre clients are on Suse linux 10.1 . In order to install lustre client packages of 1.8.5, i have upgraded the Suse kernel also.
How many clients do you have? I don't think this is an inode problem, since it wouldn't fail with ENOSPC during ost_write. There is also a problem with clients holding all of the space in grants (about 32MB/client/OST) as described in the above bug. However, unless you have upgraded ALL of the clients to 1.8.5, that problem will not be fixed.
Cheers, Andreas
--
Andreas Dilger
Principal Engineer
Whamcloud, Inc.
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